package one;

public class HaHa {

	public static boolean isNum(String s){
		for(int i=0;i<s.length();i++)
		{
			char a=s.charAt(i);
		if(a<'0'||a>'9'||a=='0'||a=='9')
			{return false;	
	}
		}
		return true;
		
		
		}	
		
	}


